Commit 18517a55 authored by Leif Middelschulte's avatar Leif Middelschulte Committed by Peter Hutterer

Add parameter safety check

As mentioned in bugzilla ticket 28150.
Calling '_XRRValidateCache' with 'improper' arguments results in a SEGV.
This patch adds a parameter validation to the mentioned function.
Signed-off-by: default avatarLeif Middelschulte <>
Signed-off-by: Peter Hutterer's avatarPeter Hutterer <>
parent 7a7bac90
......@@ -105,7 +105,7 @@ static XRRScreenConfiguration *_XRRValidateCache (Display *dpy,
XRRScreenConfiguration **configs;
XRandRInfo *xrri;
if (XextHasExtension(info)) {
if ((screen >= 0) && (screen < ScreenCount(dpy)) && XextHasExtension(info)) {
xrri = (XRandRInfo *) info->data;
configs = xrri->config;
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